What is the rule regarding carrying luggage in the passenger cabin of an intercity coach in Belarus?

1. Luggage may be piled high in aisles and doorways
2. Luggage must be stowed in dedicated underfloor luggage compartments or overhead racks; blocking aisles and emergency exits is strictly prohibited
3. Luggage must be tied to the passenger seats with rope
4. Luggage is prohibited on intercity buses